CN105021921B - A kind of power network based on topological analysis closes recognition methods of unlinking - Google Patents

A kind of power network based on topological analysis closes recognition methods of unlinking Download PDF

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Publication number
CN105021921B
CN105021921B CN201510391856.0A CN201510391856A CN105021921B CN 105021921 B CN105021921 B CN 105021921B CN 201510391856 A CN201510391856 A CN 201510391856A CN 105021921 B CN105021921 B CN 105021921B
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equipment
analysis
bus
switch
network
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CN105021921A (en
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张黎元
宋兴旺
肖丹丹
张颖
刘长德
张�杰
李冰洁
王永杰
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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Abstract

The present invention relates to a kind of power network based on topological analysis to close recognition methods of unlinking, this method is based on real-time grid data model and section, using generating set/equivalent circuit and equivalent power supply circuit as starting point, using Network topology mode, depth-first search analysis is carried out to grid equipment and equipment state, equipment is divided into different electrical islands and bus number according to equipment Dynamic link library relation, by the analysis to electrical island and bus number, realizes the identification that Open Loop Operation is closed to power network.Power network provided by the invention based on network topology closes recognition methods of unlinking, can quickly, accurate calculation goes out to regulate and control conjunction/Open Loop Operation, the great method of operation of power network is efficiently identified to change, foundation is provided for operation of power networks analysis, availability >=99% of analysis result, remote operation risk, the security of lifting regulation and control remote operation are advantageously reduced, its runnability is obviously improved compared with prior art and method.

Description

A kind of power network based on topological analysis closes recognition methods of unlinking
Technical field
The invention belongs to power system regulation automatization field, especially a kind of power network based on topological analysis closes knowledge of unlinking Other method.
Background technology
With the quickening of urban construction, urban power consumption is growing, and the power failure to the even short time that has a power failure all is compared It is sensitive.Under this powering mode, accident, interruption maintenance are unlinked to be operated when either load shifts by closing, It may insure reliability of the power distribution network to customer power supply.But when power network closes Open Loop Operation, it is likely to occur among power network Larger steady-state current and dash current.This influences whether safely and steadily running for power network.Therefore, to be predicted in advance before operation Relevant issues, efficiently identify the great method of operation of power network and change, this safe and stable operation to power network has very important Meaning.
The power network based on network topology being related in patent of the present invention closes recognition methods of unlinking, can quickly, accurate calculation goes out Regulate and control conjunction/Open Loop Operation, efficiently identify the great method of operation of power network and change, provide foundation for operation of power networks analysis, be advantageous to Reduce remote operation risk, the security of lifting regulation and control remote operation.
The content of the invention
It is an object of the invention to overcome prior art insufficient, there is provided the one of a kind of security for lifting regulation and control remote operation Power network of the kind based on topological analysis closes recognition methods of unlinking.
The technical solution adopted by the present invention is:
A kind of power network based on topological analysis closes recognition methods of unlinking, and this method is based on real-time grid data model and broken Face, using generating set/equivalent circuit and equivalent power supply circuit as starting point, using Network topology mode, to grid equipment and Equipment state carries out depth-first search analysis, and equipment is divided into different electrical islands and bus according to equipment Dynamic link library relation Number, by the analysis to electrical island and bus number, realize the identification that Open Loop Operation is closed to power network.
Include successively moreover, the power network based on topological analysis closes recognition methods of unlinking:
(1) electric network model is analyzed, and the electrical equipment of search includes unit, transformer, line needed for electricity grid network topological analysis Road, bus, switch, disconnecting link, grounding switch etc., wherein, unit, bus, grounding switch distribute one as a single-ended model Connect period;Circuit, switch, disconnecting link distribute two connection periods as a both-end model;Transformer, according to winding number, Two or three connection periods of dynamically distributes, connected equipment connection period are identical;
(2) Network Topology Discovery is analyzed, using generating set/equivalent line facility as starting point, according to equipment connecting relation and Equipment point/conjunction state, depth-first Network Topology Discovery is carried out, until searching power failure equipments, load, for the electric of traversal Equipment carries out electrical island set, if electrical equipment electrical island has been set, continues search for, according to above flow, Zhi Daosuo There is generator all to search for finish;Using bus as starting point, Network Topology Discovery is equally carried out, searches power failure equipments, load, master Become, carry out bus set for the equipment traveled through, according to above flow, all search for and finish until all buses;
(3) solution ring analysis is closed, and system is simulated drawing/switch-dividing, analysis both sides electrical island number and bus number by program, come Discriminate whether to close Open Loop Operation.
Moreover, in step (3) described conjunction solution ring analysis, when switching closing operation, before operation, if switch both sides are electric Island number is identical, bus difference, and after operation, switch both sides electrical island number is identical, and bus number is identical, then current operation is grasped for cyclization Make;During switch point operation, before operation, if switch both sides electrical island number is identical, bus number is identical, and after operation, electrical island number is identical, Bus difference, then current operation is Open Loop Operation.
Advantage of the present invention and good effect are:
Power network provided by the invention based on network topology closes recognition methods of unlinking, can quickly, accurate calculation go out regulation and control conjunction/ Open Loop Operation, efficiently identify the great method of operation of power network and change, provide foundation for operation of power networks analysis, analysis result can use Rate >=99%, remote operation risk is advantageously reduced, the security of lifting regulation and control remote operation, its runnability is compared with prior art And method is obviously improved.
Brief description of the drawings
Fig. 1 is the electrical connection schematic diagram in the present invention;
Fig. 2 is the topology search flow chart in the present invention;
Fig. 3 is that the conjunction in the present invention is unlinked analysis process figure.
Embodiment
Below by accompanying drawing, the invention will be further described in conjunction with specific embodiments, and following examples are descriptive , it is not limited, it is impossible to which protection scope of the present invention is limited with this.
A kind of power network based on topological analysis closes recognition methods of unlinking, and sees Fig. 1, this method is based on real-time grid data model And section, using generating set/equivalent circuit and equivalent power supply circuit as starting point (alternating current symbol table in three circles in Fig. 1 Show), using Network topology mode, depth-first search analysis is carried out to grid equipment and equipment state, moved according to equipment Equipment is divided into different electrical islands and bus number by state annexation, by the analysis to electrical island and bus number, is realized to electricity Net closes the identification of Open Loop Operation.A-F represents transformer station in Fig. 1, and the specific equipment in transformer station is not drawn.With generator or wait The circuit being worth for power supply is that starting point carries out Network Topology Discovery and electrical island, bus number are calculated and analyzed, each in final plant stand Electrical equipment can all generate an electrical island number and bus number, by analyzing electrical island and bus number before and after electrical equipment operation Numerical value can correctly verify out conjunction Open Loop Operation situation.
Recognition methods of unlinking is closed based on the electric grid operating of network topology, including topology search analysis solves (see Fig. 2) with conjunction Ring analysis (see Fig. 3) two parts content, its specific works step are as follows:
Step 1:Electric network model loading is carried out, obtains connection period, the status information of equipment of grid equipment, model loading Time≤3s;
Step 2:Generating set/equivalent circuit is extracted, topology is proceeded by from generating set/equivalent circuit and searches Rope, if the equipment electrical island number searched is -1, current electrical island number is arranged to, until each branch road searches power failure equipments Or load, to the generator electrical island number plus 1 that next electrical island number is -1, equally searched for, by that analogy;
Step 3:All buses are extracted, topology search is proceeded by from hair bus, if if the equipment searched is female Wire size is -1, then is arranged to current bus number, until each branch road searches power failure equipments, load or main transformer, to next mother Line is equally searched for, by that analogy, the topological analysis time≤1s;
Step 4:When carrying out switching manipulation, current switch type is analyzed, if a point operation, is obtained two after switching manipulation The electrical island number of side apparatus, bus number, if switch both sides electrical island number is identical, bus difference, then the operation is Loop Closing Operation; If closing operation, the electrical island number of two side apparatus, bus number before acquisition switching manipulation are female if switch both sides electrical island number is identical Wire size is different, then the operation is Open Loop Operation, closes/unlink checking time≤1s.
By examining, availability >=99% of this method analysis result
Although disclosing embodiments of the invention and accompanying drawing for the purpose of illustration, those skilled in the art can manage Solution:Do not departing from the present invention and spirit and scope of the appended claims in, it is various replace, change and modifications all be it is possible, Therefore, the scope of the present invention is not limited to embodiment and accompanying drawing disclosure of that.

Claims (2)

1. a kind of power network based on topological analysis closes recognition methods of unlinking, it is characterised in that:This method is based on real-time grid data Model and section, using generating set/equivalent circuit and equivalent power supply circuit as starting point, using Network topology mode, to electricity Net equipment and equipment state carry out depth-first search analysis, are divided into equipment according to equipment Dynamic link library relation different electric Island and bus number, by the analysis to electrical island and bus number, the identification that Open Loop Operation is closed to power network is realized, it is described based on topology The power network of analysis closes recognition methods of unlinking to be included successively:
(1) electric network model is analyzed, and the electrical equipment of search includes unit, transformer, circuit, mother needed for electricity grid network topological analysis Line, switch, disconnecting link, grounding switch, wherein, unit, bus, grounding switch distribute a tie point as a single-ended model Number;Circuit, switch, disconnecting link distribute two connection periods as a both-end model;Transformer, according to winding number, dynamic point It is identical with two or three connection periods, connected equipment connection period;
(2) Network Topology Discovery is analyzed, and using generating set/equivalent circuit and equivalent power supply circuit as starting point, is closed according to equipment connection System and equipment point/conjunction state, carry out depth-first Network Topology Discovery, until searching power failure equipments, load, for traversal Electrical equipment carries out electrical island set, if electrical equipment electrical island has been set, continues search for, according to above flow, directly All search for and finish to all generators;Using bus as starting point, Network Topology Discovery is equally carried out, power failure equipments is searched, bears Lotus, main transformer, bus set is carried out for the equipment traveled through, according to above flow, all searches for and finishes until all buses;
(3) solution ring analysis is closed, and system simulates drawing/switch-dividing, analysis both sides electrical island number and bus number by program, to differentiate Whether Open Loop Operation is closed.
2. the power network according to claim 1 based on topological analysis closes recognition methods of unlinking, it is characterised in that:In step (3) In described conjunction solution ring analysis, when switching closing operation, before operation, if switch both sides electrical island number is identical, bus difference, behaviour After work, switch both sides electrical island number is identical, and bus number is identical, then current operation is Loop Closing Operation;During switch point operation, operation Before, if switch both sides electrical island number is identical, bus number is identical, and after operation, electrical island number is identical, bus difference, then current behaviour As Open Loop Operation.
CN201510391856.0A 2015-07-06 2015-07-06 A kind of power network based on topological analysis closes recognition methods of unlinking Active CN105021921B (en)

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CN107658870A (en) * 2017-10-17 2018-02-02 中国南方电网有限责任公司超高压输电公司检修试验中心 People having the same aspiration and interest unit division Fast implementation based on divided power system topological structure
CN112199861B (en) * 2020-10-29 2023-04-07 云南电网有限责任公司电力科学研究院 Power distribution network closed-loop power regulation feasibility judgment method
CN115144679B (en) * 2022-08-31 2022-11-29 武汉格蓝若智能技术有限公司 Method and system for identifying real-time topological relation of collected voltage on line

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